360 - mini hypnodisc

[Max]

Does the toothless timing pulley mean the belt can slip in impacts? Why not use a v belt or o belt if you want it to slip?

[Mouldy]

V belts dont like tight radius's such as the small pulley id want to use on the motor, and i dont trust the o belts to remain at a constant tension.

Timming belts (especially the HDT range) are very strong and flexible...


Jamie- yeah i know it looks like the love child of galactus /touro / drumroll but its kinda hard to make a drum robot that doesnt look like that while being invertible :P

Whats the length, diameter, weight and speed of drumrolls drum? Trying to work out if im going to actually be able to turn without flipping it lol.

[typhoon_driver]

It's gonna flip. Get some magnets in there

[RogueTwoRobots]

Jamie- yeah i know it looks like the love child of galactus /touro / drumroll but its kinda hard to make a drum robot that doesnt look like that while being invertible

Whats the length, diameter, weight and speed of drumrolls drum? Trying to work out if im going to actually be able to turn without flipping it lol.

Yeah, trying to come up with something different looking is tricky. Mine is pretty much a Proteus/Reboot love child, figured the best way to make it look different was to lather it in metallic blue paint.

Can't remember the exact stats off the top of my head but it's something like 180mm long, 76mm diameter tube (with 12mm deep teeth) and around 2.2kg spinning at - theoretically - 7000rpm, so minus a few hundred for losses.
To be honest, I find the gyro-dancing reasonably controllable. If I'm going in a straight line then turn, one side will lift up but it drops back down again by the time you've completed the turn. Actually helps to prevent over-steering to a degree. If I want to use the gyro to flip it, I usually have to crank the transmitter stick completely to the left or right to get it to turn itself over. So it may look wild and out-of-control, but I like to think I've got it obeying my commands

If your drum is heavier/faster I imagine the effects will be exacerbated, so you may well feel the need to add magnets. Best bet would be to just try it out once it's all running and see what you think.

[PJ-27]

Just think of it as a self righter for free!

[Mouldy]

Changed my mind on the gear ratio, decided to slow it down to 13,000rpm on paper due to strain on the motor etc... glad i did, as i tested it today and its a tad current hungry on spin up.... works ok though;

http://www.youtube.com/watch?v=F9EEOcTAvKA



should be able to get the current draw down, belts slightly tight at the moment, and the timing on the motor wasnt set right.

[Ellis]

Jesus Christ that's insane man, the noise! The RPM! The amps?!

Combat robot porn.

[Anttazz]

Scary sounding stuff. Will be interesting to see how effective it is at such high speed

[Gabe01]

I really appreciated the perfect spin up no wobble / vibration.

[Mouldy]

Yeah seems ok gabe, it was clamped in the vice for the test, but it would of shook the table a bit if it was out of balance... I'll try get the top and bottom wedge/feet bits made in the next few days so I can do a spin up and drive test.